1swk

CORE-STREPTAVIDIN MUTANT W79F IN COMPLEX WITH BIOTIN AT PH 4.5

Method: X-RAY DIFFRACTION Dmax: 64.6 Å Quality: GOOD

1. Protein Identity and Related Structures Protein Identity & Related Structures

CORE-STREPTAVIDIN

Streptomyces avidinii

UniProt P22629

State in the Current Structure

Assembly Oligomeric State Construct Mutations and Modifications Ligands, Ions and Associated Components Method and Experimental Conditions Structure Quality
1 Protein homooligomer Homooligomer Protein × 4 PDB declaration: tetrameric(4) Consistent with protein copy count Chain A; UniProt 37–163 Chain B; UniProt 37–163 Chain C; UniProt 37–163 Chain D; UniProt 37–163 Mutation:W79F BTN BIOTIN × 3 BTQ EPI-BIOTIN × 1 X-RAY DIFFRACTION X-ray crystallization conditions:pH 4.5;pH 4.5 Resolution 2.00 Å R-free 0.238

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

312 other PDB entries and 368 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name SAV_STRAV
Isoform
PDB entities 1
Chains and sequence ranges Author chain A; PDBConstruct 1–127; UniProt 37–163 Author chain B; PDBConstruct 1–127; UniProt 37–163 Author chain C; PDBConstruct 1–127; UniProt 37–163 Author chain D; PDBConstruct 1–127; UniProt 37–163

The page prioritizes protein identity, the current assembly, associated components, oligomeric state and cross-PDB links. Chain mapping and sequence ranges are retained as data evidence. Internal IDs, import timestamps and assembly operation expressions are maintenance fields and are not shown here.

SAXS scattering curve SAXS Profile

SAXS profile for 1swk

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 1swk
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2. Structure Basics 2. Structure Basics

Entry ID entry_id1swk
Deposition date deposition_date1998-01-27
Structure title titleCORE-STREPTAVIDIN MUTANT W79F IN COMPLEX WITH BIOTIN AT PH 4.5
Keywords keywordsBIOTIN-BINDING PROTEIN; BIOTIN-BINDING PROTEIN
Experimental Method methodX-RAY DIFFRACTION

3. SAXS Parameters (CRYSOL theoretical calculation) 3. SAXS Parameters (CRYSOL)

Radius of gyration Rg (Guinier) rg_guinier22.34
Radius of gyration Rg (electron density) rg_electron21.26
Forward intensity I(0) i045141200.00
Molecular weight molecular_weight50187.0 kDa
Excluded volume excluded_volume61808 ų
Envelope volume envelope_volume70912 ų
Hydration-shell volume shell_volume26717 ų
Envelope diameter envelope_diameter68.1
Shell Rg shell_rg28.74
Envelope Rg envelope_rg21.49
Shape Rg shape_rg21.23
Total Rg total_rg22.15
Total atoms total_atoms3552
Residues n_residues468
Spherical-harmonic order n_harmonics20
q range q_range— – 0.5000 −1
Data points n_points101
Shell type shell_typedirectional
Solvent electron density solvent_density0.3340 e/ų
Shell contrast contrast_shell0.0300 e/ų
CRYSOL version crysol_version4.1.3

4. P(r) Distance Distribution (GNOM inversion) 4. P(r) Analysis (GNOM)

Maximum dimension Dmax dmax64.6
Rg (real space) rg_real22.18
Rg uncertainty (real space) rg_real_error0.31
I(0) (real space) i0_real4.5140e+07
I(0) uncertainty (real space) i0_real_error5.4130e+05
Rg (reciprocal space) rg_reciprocal22.22
I(0) (reciprocal space) i0_reciprocal45140000.0000
Solution quality estimate total_estimate0.8360
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary30.4
Skewness Skewness skewness0.089
Kurtosis Kurtosis kurtosis-0.534
Angular range angular_range— – 0.3550 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha13450000.0000
Real-space data points n_real_points67
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.961; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.982; Smooth: 0.000

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (4)

7. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (4 domains)

Domain ID domain_idd1swka_
Class classb — All beta proteins
Fold Fold foldb.61 — Streptavidin-like
Superfamily Superfamily superfamilyb.61.1 — Avidin/streptavidin
Family Family familyb.61.1.1 — Avidin/streptavidin
Domain ID domain_idd1swkb_
Class classb — All beta proteins
Fold Fold foldb.61 — Streptavidin-like
Superfamily Superfamily superfamilyb.61.1 — Avidin/streptavidin
Family Family familyb.61.1.1 — Avidin/streptavidin
Domain ID domain_idd1swkc_
Class classb — All beta proteins
Fold Fold foldb.61 — Streptavidin-like
Superfamily Superfamily superfamilyb.61.1 — Avidin/streptavidin
Family Family familyb.61.1.1 — Avidin/streptavidin
Domain ID domain_idd1swkd_
Class classb — All beta proteins
Fold Fold foldb.61 — Streptavidin-like
Superfamily Superfamily superfamilyb.61.1 — Avidin/streptavidin
Family Family familyb.61.1.1 — Avidin/streptavidin

CATH v4.4 (4 domains)

Domain ID domain_id1swkA00
Class class2 — Mainly Beta
Architecture architecture40 — Beta Barrel
Topology topology128 — Lipocalin
Homologous superfamily homologous superfamily30 — Avidin-like
Domain ID domain_id1swkB00
Class class2 — Mainly Beta
Architecture architecture40 — Beta Barrel
Topology topology128 — Lipocalin
Homologous superfamily homologous superfamily30 — Avidin-like
Domain ID domain_id1swkC00
Class class2 — Mainly Beta
Architecture architecture40 — Beta Barrel
Topology topology128 — Lipocalin
Homologous superfamily homologous superfamily30 — Avidin-like
Domain ID domain_id1swkD00
Class class2 — Mainly Beta
Architecture architecture40 — Beta Barrel
Topology topology128 — Lipocalin
Homologous superfamily homologous superfamily30 — Avidin-like

8. Citations (3)

9. Files and Curves (10)